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Derix MM, de Gans J, Stam J, Portegies P.Derix MM, et al. Among authors: portegies p.Clin Neurol Neurosurg. 1990;92(3):215-22. doi: 10.1016/0303-8467(90)90023-x.Clin Neurol Neurosurg. 1990.PMID: 2171828
de Gans J, Portegies P, Tiessens G, Troost D, Danner SA, Lange JM.de Gans J, et al. Among authors: portegies p.AIDS. 1990 May;4(5):421-5.AIDS. 1990.PMID: 2164819
Portegies P, de Gans J, Lange JM, Derix MM, Speelman H, Bakker M, Danner SA, Goudsmit J.Portegies P, et al.BMJ. 1989 Sep 30;299(6703):819-21. doi: 10.1136/bmj.299.6703.819.BMJ. 1989.PMID: 2510843Free PMC article.